Lost my "Posts" page - can i get another?

hi there!
i am using my blog (http://ecpparents.wordpress.com password shalom) as a website. i made all of the pages into just plain pages with no sidebar and no ability to "post" in chronological order, like a blog. now i'd like to make the page "minutes" into a page containing posts with a sidebar where i can use the archive widget to let people browse minutes from meetings past.
did i lose my post page forever? or can i create a new page with the blog format?
thanks so much!

One cannot lose a posts page. The front page of the blog by default will display your posts (not pages) in reverse chronological order, with the most recently published post on top. If you do not want all the posts to show on the front page, then you can create a static front page “Welcome” for your site and a “Blog” page for posts.
Choice 1 static front page
Choice 2 running page for all posts on front page
Which do you choose? It’s one or the other.
If you choose a static front page then you have to create two pages as I said above. After you do that you go to > Settings > Reading and make the designation change and click “save changes”. http://en.support.wordpress.com/pages/front-page/

I posted the password so that you could look at my pages and see what I am talking about. It's not super-sensitive information and I can change the password when I have a solution to the problem - so no worries!

timethief - thank you - but i think i've messed things up beyond what your instructions would fix!

i did start out with a running page, of course, and added a bunch of static pages. the running page was my "welcome" page. when i figured out that i wanted my welcome page to be static, i created a static welcome page and then DELETED my original one, which had the running post format. now i'm looking to add a running post page back into the mix!

so either you totally get what i'm saying and my lack of skills isn't letting me interpret the solution, or i needed to give more info, which hopefully i just did!

The "running post format" page is a dynamic page: it's created on the fly, so you cannot actually delete it. If you want "Minutes" to display your posts, you simply go to Settings > Reading, select that page as your posts page, click Save Changes.

There is only one running page for posts in a blog and it makes no fifference that you deleted the welcome page all you have to do is either
(1) choose an existing page as the one for posts to display on from the Posts page drop-down, or (2) create a new page as the one for posts to display on first and then designate it here:
Settings > Reading
Reading Settings
Front page displays